and check the item; "Tray Notifications Cache" under "Advanced" options.
Now stop and then restart Explorer.
This clears the cache and resolves most problems.
Restarting windows is no use, you have to restart Explorer, ( which is the operating shell), for the repair to work.
Copy and paste the following into a new document:
taskkill /f /IM explorer.exe
Save your document with a descriptive name such as restart_explorer.bat. Make sure to save the file with the .bat
extension and not
Remember to uncheck the item in CCleaner once you have finished.